(core) move home server into core

Summary: This moves enough server material into core to run a home server.  The data engine is not yet incorporated (though in manual testing it works when ported).

Test Plan: existing tests pass

Reviewers: dsagal

Reviewed By: dsagal

Differential Revision: https://phab.getgrist.com/D2552

app/common/resetOrg.ts

@@ -0,0 +1,44 @@
+import {ManagerDelta, PermissionDelta, UserAPI} from 'app/common/UserAPI';
+
+/**
+ * A utility to reset an organization into the state it would have when first
+ * created - no docs, one workspace called "Home", a single user.  Should be
+ * called by a user who is both an owner of the org and a billing manager.
+ */
+export async function resetOrg(api: UserAPI, org: string|number) {
+  const session = await api.getSessionActive();
+  if (!(session.org && session.org.access === 'owners')) {
+    throw new Error('user must be an owner of the org to be reset');
+  }
+  const billing = api.getBillingAPI();
+  const account = await billing.getBillingAccount();
+  if (!account.managers.some(manager => (manager.id === session.user.id))) {
+    throw new Error('user must be a billing manager');
+  }
+  const wss = await api.getOrgWorkspaces(org);
+  for (const ws of wss) {
+    if (!ws.isSupportWorkspace) {
+      await api.deleteWorkspace(ws.id);
+    }
+  }
+  await api.newWorkspace({name: 'Home'}, org);
+  const permissions: PermissionDelta = { users: {} };
+  for (const user of (await api.getOrgAccess(org)).users) {
+    if (user.id !== session.user.id) {
+      permissions.users![user.email] = null;
+    }
+  }
+  await api.updateOrgPermissions(org, permissions);
+  // For non-individual accounts, update billing managers (individual accounts will
+  // throw an error if we try to do this).
+  if (!account.individual) {
+    const managers: ManagerDelta = { users: {} };
+    for (const user of account.managers) {
+      if (user.id !== session.user.id) {
+        managers.users[user.email] = null;
+      }
+    }
+    await billing.updateBillingManagers(managers);
+  }
+  return api;
+}